5VDC Encoder with Micrologix 1000

husnain.mahmood · Jun 13, 2011

Hi guys,
I have an encoder with 5VDC input and the output is also 5vdc. I need to connect it with the Micrologix 1000, as it only supports input with 14~24vdc. Is there any circuit i can use to convert my 5VDC Signat to 24VDC.
Regards,
Husnain Mahmood

bernie_carlton · Jun 13, 2011

See the Optical Isolator Module here.

husnain.mahmood · Jun 15, 2011

Thanks, but my budget does not allow me to purchase such a high value item.

kolyur · Jun 15, 2011

Look at using a solid-state relay (SSR). Pick one with a 5vdc coil, just make sure the switching frequency is high enough to handle the encoder's frequency.

BryanG · Jun 15, 2011

I use these as interface relays, the LED helps with diagnostics.
http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=5330047
You will need a 5V supply for the Encoder.

bennyk@37.com · Feb 3, 2014

hello bryan. do these really work?

i have a 5V encoder and need a 24V pulse train. mine will be pulsing at about 20kHz

baldone · Feb 3, 2014

[email protected] said:
hello bryan. do these really work?

i have a 5V encoder and need a 24V pulse train. mine will be pulsing at about 20kHz

If you need 20khz then you need more than a Micrologix 1000.

6.6 khz is the max on the Micro 1000.
You will need at least a Micrologix 1200.

bennyk@37.com · Feb 3, 2014

thanks baldone.

well i am actually using a Beckhoff PLC. i have an encoder and need to convert its 5V pulse train to a 24V pulse train for my encoder module.

i was just wondering if that Phoenix Contact device mentioned would be suitable for the conversion

baldone · Feb 3, 2014

[email protected] said:
thanks baldone.

well i am actually using a Beckhoff PLC. i have an encoder and need to convert its 5V pulse train to a 24V pulse train for my encoder module.

i was just wondering if that Phoenix Contact device mentioned would be suitable for the conversion

Looks like it's only good to 300hz so it will probably not work.

Which Beckhoff controller are you using?

bennyk@37.com · Feb 3, 2014

I am using a CX9001 with a KL5111 encoder card. yes i saw that however i think there is a 100kHz version as well

shooter · Feb 3, 2014

prefer to make it with a opto isolator IC like a 4N35 for example.
the 5 volt side will light a led in the optocoupler and a transistor inside will go to short the output, together with a resistor on the 24 Volt power it will set the input to ON.

BryanG · Feb 3, 2014

Hi

I use the 24V in and out and they do have a 100kZ version. The Phoenix data sheets aren't very helpful so I can't see if they have a 5V in with 24V out at 100Kz.

With a bit of persistence on the RS website I found 533-0003

Link to Phoenix website:
https://www.phoenixcontact.com/onli...-oc-itemdetail:pid=2964270&library=usen&tab=1

which is 5V d.c in 4-30V d.c. out and 100kZ

You will still need a 5V supply and you could run in to trouble if you need quadrature at high speed because of slight differences in the opto units.

bennyk@37.com · Feb 3, 2014

Well I just need a speed measurement so don't think I will be using quadrature.
this is the one that I was looking at I think it is the same as the one you mentioned. Do you think it would work?
http://uk.rs-online.com/web/p/optoc...eproducts-_-FeaturedProductsContent-_-5330003

one other quick question regarding the "pulses per revolution" if you know the answer

this is the encoder wheel that I am using. http://uk.farnell.com/avago-technologies/heds-6140-j06/code-wheel-1024ppr-3ch-1-4/dp/1654878

I was wondering how it has 1024 pulses per revolution? I cant see that there are 1024 slots on the wheel?

mdim · Feb 3, 2014

As far as I'm familiar many encoders use line driver IC like this when the output should be 8-30VDC
http://www.avagotech.com/pages/en/m...grated_circuits/line_driver_ic/aeic-7272-s16/

And it remains almost industrial application without much "hobby" electronics on it.

BryanG · Feb 4, 2014

533-0003 does seem to be the part you want, though looking on the RS website it is out of stock till tomorrow. I use the 24Vd.c. In 24V d.c. Out version and they seem to work well, though I am working at maybe 200Hz.

The picture on the Farnell website is just for illustration so don't worry that you can't see 1024 slots. If the description says 1024 ppr then it should be a 1024 ppr system. I would always check that you are getting the pulses expected by performing one revolution and seeing if the count is anywhere near 1024.

5VDC Encoder with Micrologix 1000

husnain.mahmood

Member

bernie_carlton

Lifetime Supporting Member + Moderator

husnain.mahmood

Member

kolyur

Lifetime Supporting Member + Moderator

BryanG

Member

[email protected]

Member

baldone

Member

[email protected]

Member

baldone

Member

[email protected]

Member

shooter

Member

BryanG

Member

[email protected]

Member

mdim

Member

BryanG

Member

Similar Topics